Process of fixing sulfid colors.



LUDWIG LIoH'rENsTEIn, or KoNIGINHoF-on-TnE-nmn AUSTRIA-HUNGARY."

PROCESS OF FIXING SULFII) COLORS.

No llrawing.

Specification of Letters Patent.

Patented une 7,1910.

To all whom it may concern:

Be it known that I, ,LUDWIG' LICHTEN- STEIN, doctor of philosophy, 2. subject of the Empire of Austria-Hungary, and a resident of KtSniginhof-on-the-Elbe, in the Province of Bohemia, of the Austro-Hungarian Empire, have invented some-new and useful Improvements in Processes of Fixing Sulfid Colors During Printing and Dyeing, of which the following is a full description. I-have discovered that sulfid colors may be precipitated by animal colloids.

All the: methods known so far for print Iing sulfid colors, showthe drawback that the dyestufis do not become fixed sufliciently well on the fiber, especially on unmercerized goods.

I- have found that sulfid colors may be precipitated with animal colloids, such as for instance glue, albumen, casein, etc. The fiber is for this purpose impregnated with the colloids, the goods being dyed or printed with sulfid colors during or after the fixing of the colloids. I

The rocess is illustrated by the following examp e: The piece-goods are impregnated on the hotflue with a solution of glue, for deep shades for instance, 1 part glue and 6 parts water or 1 part pur gelatinand 15 parts water. The goods are then printed with a print paste composed of the sulfid color, a reducing agent and formaldehyde, passed up to 5 minutes through the vMather 1 i & Platt steamer, and finished. The print.

paste has for instance the following composition: r 30-100 parts by weight of dyestufl' 80 v C (G C C t 0 v (c u 4 a Svrup I 5 Turkey red oil 40. formaldehyde brought to 1000 parts by weight by the addition of solution of yellow dextrin. F inally, it is advisable to give the goods a passagethrough' a hot liquor containing 2 Lbs. glue and 1% oz. bichromate of potash per. 10 gallons liquor, and then to pass them through soap liquors. u

If sulfidvcolors are to be printed alongs1de vof ice' colors, the goods are impregnated with 10 gallons of a solution containing 1 part glue in 6 parts water 1n which solution Application filed August 13, 1909. Serial No. 512,754.

are dissolved 3 lbs. betanaphthol-, "5 lbs. caustic-soda lye 22 degUB', and 1 gallon'of" a 25% water solution of c'astor oil's'oap.

The rapid dyeing of'sulfid'colors bythe' new method is carried outf-for instance in combination, with reserve method in the following manner The pieces are prepared on a hot flue with a solution of *8 lbs. gelatin or 20 lbs. glue in 10 gallons wateiflto which have been added 2% lbs." formaldehyde 40%,

and then printed with 'thereserves." The goods printed in this manner are 'dyed'in the padding machine in one passa'g'elasting from, 3 to 5 seconds; the goods are't-hen developed by an air passage-and finally passed throu 11 hot diluted hydrochloric-acid, and soape ,It may be an advantage sometimes through a covered vat heated by .the intror duction of live steam.

If ice color reserves are to be printed on, 3 lbs. beta naphthol, 5 lbs. caustic-soda lye 22 deg. B and 1 gallon of a 25% water solution of castor oil soap are to be added to the, glue-formaldehyde solution prepared in the manner described before. In this case it is an advantage to give the goods a passage through the Mather & Platt after thetdyeing, or to prepare the goods first with a glue-formaldehyde solution, then with a common naphtholate solution, and then dye in the adding machine, as before stated.

' The dye-liquor may be of a similar composition as the print color, for instance:

30 to 100 papt's by weight of dyestufi' so lye 4 0 (4 64 4 d S 1'11 44 (C (C y p 5 50 parts by weight of dextrin dissolved in 50 parts by weight of water, and if necessary, 40 parts by weight of sodium sulfid brought to 1000 parts by weight with water.

because the colloids must for this purpose to pass the goods after the air passage 1 Turkey 'red oil.

be precipitated on the fiber, and because the finish easily separates from the fiber.

In German Patent No. 106958 a method for Weighting silk by a treatment with glue and formaldehyde is described, but from this patent application it cannot be deduced that the sulfid colors have a better aflinity for sill; prepared in this manner than for ordinary, prepared silk. It is further, mentioned on page (31 of "Le/wws Faerber-Zeitung 1906' that fabrics are mordanted With casein and formaldehyde in order to allow of fast dyeings being pro duced on such goods by means of acid or' basic colors. -Sulfid colors are, however, not mentioned in this publication, and from the afore-stated details it could not be concluded that such a preparatory treatment could be of any advantage to sulfid colors, because this preparatory treatement is used as a mordant for the acid and basic dyestuffs which have no afiinity for the unmordanted cotton fiber, Whereas sulfid colors require 11(f11101dil1lt for dyeing on cotton, the preparatory treatment serving in the case of the before'cited application only as a means to accelerate the exhaustion of the dyestufi'. I

Having now particularly described and ascertained the nature of my said invention and in What manner the same is to be performed, I declare that What I claim is l. Aprocess for fixing sulfid colors in dyeing and. printing by means of animal colloids, said process consisting in impregnating the fiber with a solution of an animal colloid, anddyeing or printing with sulfid colors together with a fixing agentof the colloid.

2. A process for fixing sulfid colors in dyeing and printing by means of animal colloids, said process consisting in impregnating the fiber with a solution of an animal colloid, precipitating the same on the fiber, and dyeing or printing with sulfid colors.

In witness whereof I have hereunto signed my name this 26 day of July 1909, in the presence of two subscribingwitnesses.

LUDlYIG LICHTENSTEIN. \Vitnesses JOHANN ZEIDLER, JULIUS OATZKER. 

